21622203372263 has 4 divisors (see below), whose sum is σ = 23285449785528. Its totient is φ = 19958956959000.

The previous prime is 21622203372251. The next prime is 21622203372307. The reversal of 21622203372263 is 36227330222612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21622203372263 - 2¹⁸ = 21622203110119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21622203372263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21622203372233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831623206613 + ... + 831623206638.

It is an arithmetic number, because the mean of its divisors is an integer number (5821362446382).

Almost surely, 2^{21622203372263} is an apocalyptic number.

21622203372263 is a deficient number, since it is larger than the sum of its proper divisors (1663246413265).

21622203372263 is a wasteful number, since it uses less digits than its factorization.

21622203372263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663246413264.

The product of its (nonzero) digits is 435456, while the sum is 41.

Adding to 21622203372263 its reverse (36227330222612), we get a palindrome (57849533594875).

The spelling of 21622203372263 in words is "twenty-one trillion, six hundred twenty-two billion, two hundred three million, three hundred seventy-two thousand, two hundred sixty-three".